Method

NumCosmoRecombdtau_dx

Declaration [src] 

gdouble
nc_recomb_dtau_dx (
  NcRecomb* recomb,
  NcHICosmo* cosmo,
  const gdouble lambda
)

Description [src]

Computes the derivative of the optical depth with respect to $x = 1 + z$, $\frac{\mathrm{d}\tau}{\mathrm{d}x}$, at lambda.

Parameters

cosmo

Type: NcHICosmo

A NcHICosmo.

The data is owned by the caller of the method.
lambda

Type: const gdouble

$\lambda = - \ln(1+z)$.

Return value

Type: gdouble

$\left.\frac{\mathrm{d}\tau}{\mathrm{d}x}\right|_{\lambda}$.